music: 1980S Group who had success with fields of Fire and chance?

Questions

Which once-common disease was also known as the 'white death'?

Who succeeded U Thant as Secretary General of the United Nations?

Which singer had top ten hits in the 1980s with Sledgehammer and Games Without Frontiers?

In the nursery rhyme, who visited the person with a little nut tree?

Which disease is tested for using the 'Schick Test'?